11-27-2009, 07:11 PM
I have 3 cars without abs. If the brake system is well set up(proper master cylinder sizing pad composition this also includes in car bias adjustment) abs is not something I prefer (unless its snowing). Many street/track cars are set up with brake pads that have such aggressive initial bite that a lock up is too easy to do. With pads that have less aggressive bite it will require more effort from the driver. Many of the cars we are accustomed to driving also have brake boosters that decrease the effort that needs to be made by the drivers leg. On the Panoz I run Performance Friction compound 97 pads they require allot of leg effort. To me this is better than a boosted brake system where minor variations in pedal effort can be the difference of over braking for a corner or worse locking the brakes and flat spotting tires. I have never flat spotted a tire or had a lock up condition that could not be corrected by backing off the brakes for a split second and than reapplying. I feel a major part of this is the brake systems in these cars are well selected parts that are correct for the application. I have had abs intervene way too early and hurt braking distance more than help it. There is a level of connectivity to the brakes that a 100% hydraulic non boosted brake system has that is very hard to find in any street car braking system. Another thing I don't like about ABS is the inability during a spin for the abs to become inactive. It is constantly looking for wheel speed sensor output and we have had cars that have hit walls because the ABS would not allow full lock up. The abs system is looking to keep the car moving even if the direction of travel is into a tire wall after the car spins around. But who knows how many more spins would happen with out ABS. I have talked to de participants that said when they began to spin they tried to lock up the brakes and they would have slid safely down the track but the abs wanted to keep the wheels rolling and the rolled them right into the wall damaging the car.